Water filter battery control



April 6, 1937. E. PICK WATER FILTER BATTERY CONTROL Filed Jan. 2. 1956 s Sheets-sheaf. 1

Bacxwasa ou'rmz'r April 6, 1937. E. PICK WATER FILTER BATTERY CONTROL Filed Jan. 2, 1936 6 Sheets-Sheet 2 HAND WHEEL BONNET m o W m m: m

K RT 3 m mm r ,v a 7 2 ma T 5N n m w mm a ax Y 2 2 R RVVMR W A AW Ax? FILTERING PILOT VALVE OflSING April 6, 1937. E. PICK WATER FILTER BATTERY CONTROL 6 Sheets-Sheet 4 Fil'ed Jan. 2, 1936 4 6Q 0 a m m umamfl amw MW. 9%. v 1 w m a. a 8 WM m NR 3 QM. V zcfioonufirmuu 9 P v A By F: 5:55 .5350 Q w, v R ma ma .7 x 0 Q R r 7 \N\ QR E v uuxcmun 5350 mart/Hod? \NQN \QQN I r w& h mm 2 WWN Qmwh WWH RwN mm v NNN m WEN QWWN (NNN MUSE. Mafia: m Nh K N E 52c. uhmmzemhi ma: 52:. 55 55 N62 E2? mntzzumm April 6,1937. I E, PI K 2,076,322

WATER FILTER BATTERY CONTROL Filed Jan. 2, 1936 e Sheets-Sheet 5 IF Al II Jl FP' 2 Fi i 2 l o I I g' P2 P] g T0 T0? or nL-rBRs a E O D Z .5 FILTER NO. 5. FILTER NO-2 FILTER No.1. 51 3 MULTXPORT msrsnvnws ummnzn warmmmr =L ssnvxca oumzr H 3 l a g Tomi-Ton I L'IER BACK u crux-12m W681! W553 s ovum 2% avmzaunc VALVE CYLINDER-A an INLET FROM Bo'r'roM (A .Erpc P April 6, 1937. E. PlcK WATER FILTER BATTERY CONTROL F iled Jan. 2.

' 1936 6 Sheets-Sheet 6 r02; 5mm; 35.5;

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N \NWW W H K tion of Delaware Application January 2, 1936, Serial No.-5.7,298 2 I Claims.

'I'his invention relates to, water filter battery control; and it comprises a plurality of filter units arranged in a battery with coordinated operation and control wherein master valve means control all units of the battery as a whole and the several units are controlled by a plurality of individual valves, coordinated opera-* tion of the various units being effected by power means operating both the master valve'means l0 and the individual valves with centralized conto recondition the filter bed when it becomes trol means whereby the valves are set in a first or filtering position to establish downward flow of water through all the filters of the battery and to service, then in a plurality of successive backwashing positions to shut off the flow to.

service and to pass an upward backwash fiow through one filter at a time to waste and in a final. or filter-to-waste valve position to pass water downwardly through all the filters to waste while cutting off fiow to service; and the centralized control means advantageously comprises hydraulic operation of both individual and master valve means with a common rotary multiway pilot valve which may be rotated by anelectric motor under control by constant speedelectric motor and switch means timing the several backwashing fiows and the filter-towaste fiow; all as' more fully hereinafter set forth and as claimed.

In the operation of filters for purifying liquids such as water with utilization of sand or similar material as the filtering medium, it is necessary clogged with dirt, solid matter and slime removed from the liquid. The usual practice is to backwash the filter by a more or less turbulent reversed fiow of water which carries off the accumulated dirt and loosens the filter bed with reclassification of the sand particles. After the backwash, which is usually with unfiltered water, it is customary to run the first filtrate to waste before putting the'filter back into service in order to prevent contamination of filtered .water in the service lines with the unfiltered may either leak or stick. They are difiicult to Wiesel-mam BATTERY. common Er ic lick; New York, N. Y., assignortii Tatermutit Company, New York, N. ,7 .j I

operate. i And when several filtering units are combined in a battery of filters designed for large scale work, coordinated control of numerous large valves presents many problems- One of the main advantages in a battery of filters over a single large unit is in backwashing.. Successful backwashing .requiresa high rate of flow, usually at least three to four times .the. normal filtering rate. In building single filters of large and increasing size, provision of supply and discharge lines with multiway valves and sometimes pumps and other accessories to handie a backwashing flow three or four times the filtering flow becomes impracticable. By dividing the single large unit, so to speak, into a 15 battery of smaller units, the difiiculty is eliminated. But the problem in automatic control of the reconditioning stages, backwashing, filtering to waste and returnto service is multiplied. 2'0

It is an object achieved in the present invention to facilitate coordinated control of a plurality of filtering units combined in a battery. Another achieved object is to make thecoordinated control automatic. v

In achieving these objects, I have round that the practical disadvantages of .large multiway valves in filter control are obviated and their advantages retained by replacing a plurality of multiway valves each controlling one filter- 01.3 a battery ,of filtering units with individualvalves for the several units. and master valves-controlling all units; each of thevalves'being pro-. vided with hydraulic operating means such as a cylinder and piston or diaphragm under control of a central rotary multiway pilot valve common to all valves of the battery both the individual and the master valves. 1

The common rotary multiway pilot valve makes. connections for all of the hydraulic valves with. a common fluid pressureline through a plurality of easin ports in the pilot valve having connect-- ing lines running 'to the several valves and through a rotatable pilot valve member adapted by openings and passages formed therein to connect the pressure-dine running to the valve with the various casing ports as they member is rotated. For cylinders and pistons serving as the 'hydraulic valve operating means, a common waste line running to the pilot valve is provided together with a plurality of paired casing ports in the valve affording connection for each valve operating cylinder with the waste line in addition to the pressureline connection; the arrangement being such that the pilot valve serves during I l pilot valve.

its rotation as energizing means for both opening and closing the filter valvesin predetermined order.

When hydraulic diaphragm valves are used in- 6 stead of hydraulic piston valves fewer casing ports are required in the pildt valve. opening or the closing of the diaphragm valves may be by spring action with the pilot valve energizing. the closing or opening, as the case may be. It is usually more convenient to utilize piston valves with relatively large pipe sizes and diaphragm valves with relatively small pipe sizes; In any case, complete coordination and control of reconditioning is eflected by rotation of the A master valve controls the fiow of raw water to the battery. A second master valve controls the service line running from the battery. A third and a fourth master valve control the inlet and outlet of backwash water to and from the battery, and a fifth master valve controls the outlet for filtering to waste. A single valve for each individual unit controls the backwashing of the unit. In the usual downfiow filtering the individual valves of the battery units are conveniently placed in the top tom lines serving as outlets for filtered water and as inlets for backwash water. In the filtering position of the pilot valve the raw water master valve and the service outlet master valve are held open and the various individual unit valves are also held open while the two backwash master valves and the master filtering to waste valve are held closed, For backwashing the pilot valve has a plurality-of positions equal in number to the number of units in the battery. In all of the backwashing positions the backwash inlet and outlet master valves are open while the raw water master valve for the battery and the master 4 service valve are closed, as is also the filter-towaste master valve. In each of the several backwash positions one of the individual unit valves is opened by the pilot valvewhile the remaining individual unit valves are closed. This permits the individual units to be backwashed in turn. After all of the units have been backwashed a turn of the pilot valve to the filtering to waste i position opens the master raw water valve and the filtering to waste master 'valve, also opens all of the'individual unit valves, closes the two backwash master valves and leaves the master service valve closed. This effects filtering to waste through all of the battery units simultaneously. A further turn of the pilot valve closes the filterto-waste master valve and opens the service master valve, thus returning the battery to the filtering position first described:

Modification of the valve arrangement just described makes it possible to backwash with filtered water. In this modification a master valve for the raw water is not required. Norare the master backwash inlet and outlet valves required. A master valve on the service line is needed, as is a master filter-to-waste valve, unless the filtering to waste step is obviated, as. is often possible. Each individual unit has two valve controlled lines connected to the top of the unit. Each of these two top lines has an individual valve, one controlling the raw water inlet and the other the backwash outlet. Backwash outlet lines run from the backwash outlet valves of the several units to-a common backwash outlet line. The common outlet line for filtered water from the several units serves to direct filtered water into the bottom of each unit in turnas the Either the raw watervalve torthis unit isclosed by the pilot valve and the backwash unit valve is opened. Thus each unit is backwashed in turn by filtered water from the other units. The pilot valve controls the closing of the master service valve and the successive opening of the several unit backwash valves with closing of the corresponding raw water inlet valves. After all of the units have been backwashed a filtering to waste operation requires the filter-to-waste master valve to.

beopened while the master service valveis closed.

The pilot valve operation of a filter battery.

as described lends itself readily to automatic operation and control by electrical means. For this an electric motor is provided for rotating the pilot valve rotor. The electrical controlwith the pilot valve rotor so as to stop the electhe motor upon rotation of the pilot valve by the motor to any of its operative positions. inlet lines, but they may be placed in the bot-.

In the valve control by electrical means it is sometimes advantageous to provide a rotary multiway master valve for the battery with a rotary valve operating motor and to provide as individual valves for the several units a plurality of hydraulic valves controlled by individual solenoid pilot valves, the master valve motor and the solenoid pilot valves being all controlled and timed by the electrical control means so as to coordinate the operation of the individual valves with that of the rotary master valve.

In the accompanying drawings are shown, more or lessdiagrammatically, various embodiments of theinvention. In this showing,

Fig. 1 is a diagrammatic view in elevation of a battery of filters controlled by a single rotary multiway pilot valve for backwashing with un-' filtered water;

Fig. 2 is a cross section of the pilot valve in filtering position, the section being on the line' Fig. 4 is a section on the line 4-4 of Fig. 2,

showing the pilot valve port and rotor arrangement in filtering position;

Figs. 5, 6, 7 and 8 are sections similar to Fig. 4 and showing the pilot valve port and. rotor arrangement in the several backwashing positions;

Fig. 9 is a section, also similar to Fig.4, showing the pilot valve port and rotor arrangement in the filtering to waste position;

Fig. 10 shows a diagram in elevation of a filter battery controlled by a central rotary pilot valve for backwashing each of the several unit filters with water that is prefiltered in the other units of the battery;

Figs. 11 and 11a, 12, 13, 14 and 15 are cross sections of the pilot valve of Fig. 10 showing the port and rotor arrangements in the respective positions for filtering, for backwashing the several units and for filtering to waste, Fig. 11a being a section through the rotor and port plate on line a--a. of Fig. 11;

Fig. 16 is a section through the two-way hydraulically operated individual valve shown as valve ID in Fig. 10;

' Fig. 17 is a diagrammatic view of automatic hydraulic". valves of Fig'.?18 'showing the: construction of the j'individual solenoidpilo't} valves;

-2 115 f q i i i master. el erng'. fill rin iba wasmna a g lt iona n 1 ;a Fig. 24 shows indiagrammaticforni the electrical system for automatic operation and'control of the'filter battery 'of Fig'.' 18.

Referring now to Fig. 1,;the battery consists,

as'shown, of four filter units Nos. 1, 2, 3 and 4 with individual valves VI, V2, V3 and V4 and-with five mastervalves V5, V6 and V'la, V1!) and Vlc. Master valves V5 and VB control the flow of filtered water from the battery as a whole to service and to waste, respectively. Master valves V10, Vlb and Vlc control the flow of raw water to and from the battery for backwashing purposes, valve Vla being-the backwash inlet master valve, valve V'Ib the backwash outlet master valve and V'lc serving to control the fiow of raw water to the battery for filtering and to cut off this filtering flow during the backwash.

All of the valves, both the five master valves and the four individual valves are, as shown, hydraulically operated by means of cylinders and pistons with connections to a central rotary multiway pilot valve controlling admission of pressure fluid from a common pressure line S to all of the hydraulic valve cylinders and also controlling discharge of pressure fiuid from the valve cylinders into a common waste line W and thus serving to actuate all of the hydraulic valves both for opening and closing.

Manual valves Ml, M2, M3, M4, may be provided in the several unit filters for convenience in shutting 011 an individual filter from the battery.

As shown in Fig. 2, the pilot valve is constructed with a stationary port plate and a rotor having a facing of hard rubber or material of a similar structure. .The stator port plate is formed with of ports,rmarked X and Y, having suitable pipe connections such as copper tubing running to the hydraulic cylinders of "the V valves, with numbers corresponding to those of the various V valves, as shown in Fig. 1. The X lines for master valves V5, V6, V'Ic connect the corresponding X ports of the pilot valve to the top ends of the hydraulic valve cylinders, while the Y-port connections are to the bottom ends of the valve cylinders. The backwash inlet and outlet master valves V'la and Vlb have their X-port connections to the bottom ends of the valve cylinders with the Y-port connections running to the top cylinder ends. All of the individual unit valves VI, V2, V3 and V4 have the bottom cylinder ends con-' nected to X ports and the top cylinder ends to Y ports in the pilot valve.

The pilot valve has a pressure line connection S entering the valve casing at the side as shown in Fig. 3. The pilot'valve rotor is formed with a series of openings Ol, 02; O3 and 04, running through the rotor and communicating with the 75 pressure chamber in the valve casing into which ten in e eeengof the individua ro ar mum's? T I. i positions) all oftheseportsreceivepressur and d funi v lves-sma l epwhe rb o' cavity C being so formed .as to connectin these two positions the corresponding Y-ports Yl Y2};

Y3, Y4, with, the was te portin the'portplate.

The arrangement of the X- and Y ports will be i understood from the following description of the control of the operations of the battery by means of the pilot valve.

With the pilot valve intn nitering e inen of Fig. 4, port Y5 of the master service valve ,V5 v

is connected to the pressure. line through themtor opening 02 and port X5is connected-to the waste line through rotor cavity C. Thusthe mas-- ter service valve .is kept open. In this position of the pilot valve pressure is admitted vto port X6 through rotor opening OI and to port Ylthrough I rotor opening 02 while ports Y5 and X! are connected to waste through rotor cavity C; valve V5,

the filter-to-waste master valve. being closed, and backwash inlet and outlet master valves V'la and i and V'Ib being also closed, whilev master valve Vlc is open because. of the connection of branch Y'lc to the bottom endof this valve cylinder. As

a result of these valve settings by the pilot valve in the filtering position, raw water flows through all the filter units of the battery and to service, the unit valves VI, V 2, V3, V4 being heldopen by connection of their Xeports in the pilot valve to pressure and of the corresponding Y-portsto the waste line.

When the filter battery requires backwashing, this is accomplished by closing the master service valve V5, opening themaster backwash in- I let and outlet ValVesQV'Ia and-,V'lb and closing.

master valveVlc, thus shutting oifithe .flow of raw water to the tops oif the; filters and directing. it to the bottomconnection; atthe same'timey ,.-;a opening or leaving open one of -.the 'individual filter valves and closingthe others. 1 .ihe ar-Q. rangement as shown in Figs. 1, 5, 6, .7, 8, rotation of the pilot valve 'to four successive backwash po-e sitions in turn connectsports .Xl ,,X2, X3 and X4 to the pressure line throughrec ess R! and thus efiects in succession: the opening of valves VI, V2, V3 and V4, each of thecorresponding Y-ports being in turn connected to wastefthroug h rotor cavity C as the rotor is turned successively to the four backwashing positions, and the other- Y-ports being simultaneously connected to pressure through rotor opening 04 or opening 03,v as

the case may be. The positions of the ports and the configurations of the rotor openings make these connections possible. In all of the four backwashing positions (Figs. 5, 6, 7 8) ports X6, Xi and K5 are connected to pressure by opening OI and ports Y6, Y7 and Y5 to waste by cavity C; thus holding themaster service valve V5 and master filter-to-waste valve V6 closed and keeping the master backwashing valves VIa and'Vlb open and master valve VIc closed during the-several separate and successive backwashings of units 1, 2, 3 and 4. It may be noted that the rotation of the pilot valve rotor from the filtering position to the No. 1 backwashing position is through an angle oi. approximately 90, and that the several backwashing positions are approximately 30 apart with the several paired X and Y ports for units 1, 2, 3 and 4 in a corresponding angular spacing of 30".

After the'several filters in succession have been backwashed the battery valves are set for filtering to waste by turning the pilot valve rotor through an angle of approximately 90 from the backwashing position for filter No. 4. In this filtering-to-waste position (Fig. 9) all four of the individual valves VI, V2, V3 and V4, are held open by connection of their X-ports in the pilot valve to pressure through recess Ri, the service valve V5 is closed by the connection of'port X5 to pressure through opening OI. the master backwashing valves Vla and V1!) are closed by the connection of port Y! to pressure through opening 02 and master valve We is open because of the connection of branch Y'Ic to the bottom end of its operating cylinder. In this filter-to-waste position the master valve V6 is opened by the connection to pressure of its port Y6 which is connected to the bottom end of the operating cylinder; the position of cavity C in the pilot valve rotor and its configuration being such as to connect ports Yi, Y2, Y3, Y4, Y5, X6 and X! to the waste line, through port W.

A further turn of the pilot valve rotor through an approximate 90 angle from the filtering to waste position shown in Fig. 9 returns the valve to the filtering position shown in Fig. 4, thus closing valve V6 and opening valve V5 to return the filter battery to service, the individual valves Vi. V2, V3 and VI remaining open as well as master valve Vlc.

In the battery arrangement of Fig. 1 backwashing is efifected by a high rate'of fiow of unfiltered water through each filter of the battery in turn. The normal filtering flow through the battery is readily concentrated into one fiow through each single unit, thus increasing the rate of flow for backwashing to four times the normal filtering rate. The rate of fiow for backwashing is, however, subject to regulation by means of a backwash flow controller at the discharge end of the backwash outlet line. The arrangement indi cated in Fig. 1 is described in Applebaum Patent No. 1,443,892. A similar rate of flow controller is only three separate filters, it will be understood that the valve arrangement here shown for three filtering units will be substantially the same for any desired number of units. During backwashing of the several single units by filtered water from the other units, the rate of flow may be increased over the normal filtering flow by suitable adjustment of the backwash controller to provide a suitable fiow for properly backwashing the several filters.

In Fig. 10 three diflerent types oi. individual filter valves are shown. Valve ill on filter No. 1 ts shown as a two-way valve adapted in one position to establish communication between the unfiltered water inlet line and the top 01- the filter and in the other. position to establish communication between the top of the filter and the backwash outlet line. Fig. 16 shows the structure of this valve with an operating connection to a piston and cylinder with pipe connections XII and Ylli at either end for admission and exhaust of pressure fiuid. The arrangement is such that when pressure is applied at XIII raw waterfiows into the top of filter No. 1 and when pressure is applied at Y". water leaves the filter and fiowsto the'backwash outlet line.

Filter unit No. 2 is shown as controlled by two separate hydraulic valves I23 and IZA on a T fit-- ting at the top of the filter, and connected in unison through the pilot valve with pressure and waste lines so that when valve |2B isopened to connect the filter with the unfiltered water inlet line, the othervalve HA is closed and when valve I2B is closed, then valve HA is open to allow water to 110W from the top 01' the filter into the backwash outlet line.

Similar results are obtained by the individual valve arrangement shown for filter No. 3 wherein two separate valves on the raw water inlet line and the backwash outlet line are spring diaphragm valves I33 and HA; valve I3B being normally closed by its spring and opened when pressure is admitted to the diaphragm and valveJlA being normally open and closed when pressure is -admitted to the diaphragm. The battery is shown in Fig. 10 as having only two master valves, valve I5 controlling flow from the battery to service and valve l 6 controlling the common filter-towaste outlet for the battery. The several backwash outlet valves for the individual units are shown connected into a common backwash outlet line., Both the backwash outlet line and the-filter-'to-waste outlet deliver into a waste receiver with automatic rate of flow control by fioat valves as described in the Applebaum Patent No. 1,443,892.

The pilot valve of Figs. 10 to 16 is similar to that of Figs. 1 to 9, but its structure is considerably simplified because of the smaller number of hydraulic valve connections required for operation of the battery and of the fact that the individual valves as shown for No. 3 filte'r are diaphragm valves requiring for both valves only a single connection to the pilot valve. Valves I23 and l 2A for No. 2 filter are served by one pressure port connection and one waste port. connectionin the pilot valve and the two-way valve l 0 for No. 1

filter takes the place of the two valves on each of the other units.

' In the filtering position of -the pilot valve, as shown in Figs. 11 and 11a, ports XIO, XIZ, Xl3 and XIS are supplied with pressure through the rotor recess R while ports Ylfl, YI2 and YIS are connected to waste port W through cavity C, so that the filter-to-waste outlet master valve i6 is closed, valve l0 connects No. 1 filter to the raw water line, valves I23 and I 3B are open and valves I2A and 13A are closed. Port Yi5 is supplied with pressure through the single opening 0 formed in the pilot valve rotor, with port Xi5 connected to waste through the rotor cavity C, thus opening the master service valve ii. In this position of the pilot valveunfiltered water flows into the tops of all the filters and filtered XI with port YI5 connected to waste and the master service valve I5 is closed. Likewise. the hydraulic connections for valve I0 are reversed so that. the raw water inlet line on No. 1 filter is shut oii and the backwash outlet line is opened. The valves on No. 2 andNo. 3 filters are left in the same positions as in the filtering stage. Raw water is filtered in filters No. 2 and No. 3 and filtered water flows from the bottoms of these units up through No. 1 filter and out through the backwash outlet line. Thus No. 1 filter is backwashed with filtered water.

Upon turning the pilot valve rotor through a second angle of 72.degrees to the backwash posi-. tion for No. 2 filter (Fig. 3), valve I0 on No. 1 filter is restored to its normal filtering position closing the backwash outlet and opening the raw water inlet. This is effected by the supply of pressure to port XIO through rotor recess R, with connection of port YIO to waste through cavity C. At the same time valve I2A is opened and valve I213 is closed by the admission of pressure to port YiZ through rotor opening 0 with connection ofport XIZ to waste through cavity C. Valve I3B is left open and valve I3A is left closed by the connection of port XI3 to pressure. Ports XI5- and XI6 receive pressure through the rotor recess and master valves I5 and I6 remain closed. Raw water is now filtered in No. l and No. 3 filters and the'filtered water backwashes No. 2 filter.

Upon turning thepilot valve to No. 3 backwashing position (Fig. 14) which is approximately 72 degrees from the second backwash position, the hydraulic connections to valves I23 and I2A are reversed by the passing of rotor opening 0, fronr'engagement with port YI2 with connection of port XI2 to pressure through recess R and of port YI2 to waste through cavity C. At the same time the pressure on the diaphragms of valves I33 and 13A is released by connection of port XI3 to waste through cavity 0; valve I3A being opened by its spring and valve I33 closed by its spring. The setting of valve I0 is unchanged. Valves I5 and I6 remain closed.

As a result, No. 3 filter is backwashed by filtered water from No. 1 and No. 2" filters.

- In the filter-to-waste position of the pilot valve (Fig. 15) master valve I6 is opened by pressure admitted to port YI6 through rotor opening' 0,

master valve I5 remains closed and diaphragm valves I33 and I3A are restored to their normal positions by the connection of port XI3 to the pressure line through recess R. -Valves I0; I213 and I2A remain in the filtering positions. All three units now. filter to waste.

While a short period of filtering to waste as described is usually advantageous, this may be I 35 omitted in some cases and in that event valve I6 with the filter-to-waste line in connection with the bottoms of the filters can be omitted. Then ports XI6 and YI6 in the pilot valve are not needed and the pilot valve may be returned di- 70 rectly to the normal filtering position from the last backwashing position. I

Should diaphragm valves I33 and I3A bereplaced by piston valves it is a simple matter to provide an additional port in the pilot valve port 7 plate in a position relative to that of port XI3 similar to the relative positions of ports YIO, YI2, YI5, YI6 and with an additional pipe connection and branches to the piston valves. Then in the No. 3 backwashing position of the pilot valve the positions of the individual piston valves are changed from filtering to backwashing byadmission of pressure to the additional port YI3 through rotor opening 0. Should piston valves I 2B and I2A be replaced by spring diaphragm valves, the YI2 port connection to the pilot valve would be omitted and port YI2 could be plugged.

In Fig. 17 is shown a diagram of an automatic electrical control system adapted to the battery of Fig. 10. The pilot valve is driven by avalve motor through a gear reduction. A circuitbreaker comprises a brush IIO contacting a drum III mounted on an extension of the pilot valve shaft and carrying an arm II2 adapted to make contact with any one of the main contact strips H3, II4, H5, H6 and H1, and with the auxiliary contact strips H8, H9, I20 and I2I.

To start backwashing of the-filters a master timer- I2IA which is usually electrically driven, comprises a, constant speed motor I22 and an arm I23 driven thereby, with suitable speed reduction and adapted to make contact with the adjustable contact point I24. I

For controlling the duration of the backwash in each filter and of the filter-to-waste operation of the battery there are provided individual timers I25, I26, I21 and I28 which may be of identical construction. Each timer has a constant speed motor I29 driving by means of a gear reduction I30 an arm 'I3I made of insulating material and carrying two contact plates I32 and I33. Two stationary contact strips I34 and I35 are provided with gaps I36 and I31, respectively, and are adapted to be electrically connected by plate I33.. Two short contact strips I38 and I39 are provided, adjustable as to their angular spacing in relation to the gaps I36 and 431. Contact plate I32 is adapted to establish electric connection between strips I38 and I39. An electric power line includes wire I40 with branch I connected to the master timer motor I22, branches I42 connected to the contact strips I35 of the timers I25, I26, I21 and I28 and branch I43 connected to the circuit breaker brush H0. The other. incoming power wire I44 has branch I45 connected to the valvemotor, branch I46 connected to the other pole of the mastertimer motor I22 and branches I41 connected to one pole or motor I29 of each individual timer. A wire I48 connects contact strip III or the circuit breaker contact strips H4, H6, H6 and 1 with contacts- I38 of the several timers and wires I52 connect contacts I 39 of the several timers with wire I49 leading to thevalve motor.

Operation of the electrical control system is as follows: The adjustable contact I24 01' master timer I2IA is set so as to initiate the backwashing cycle at the desired time. Motqr I22 being connected directly to the power line runs continuously. When arm I23 reaches contactthrough wires I40 124, a circuit is established and I43, brush H0, drum III, arm H2, strip H3, wire I48, arm I23, point I24, wire I49, the valve motor and wires I45 and I44. The valve motor starts and rotates the pilot valve rotor until arm H2 leaves strip H3, breaking the circuit, and comes to rest in contact with strips H4 and I I8. The pilot valve is now set in its first backwashing position. A circuit is now established from the power line through wires I40 and I43, brush H0, drum III, arm H2, auxiliary strip I I8, wire I50, motor I29 of backwash timer N0. 1 and wires I41 and I44. Motor I29 is started and rotates the arm I3I until, after a predeter- .mlned interval of time, plate I32 meets contact points I38 and I39. This establishes a circuit from wires I40 and I43 through brush H0, drum III, arm II2,-strip H4, wire I5I, contact I38, plate I32, contact I39, wires I52 and I49, the valve motor and wires I45 and I44. The valve motor again runs and turns the pilot valve rotor to backwash position No. 2, where it comes to rest due to the breaking of the circuit when the arm H2 slides oiT strip H4 and comes to rest on strips H5 and H9. The fact that arm H2 leaves auxiliary strip I I8 does not stop the motor I29 because in the meantime plate I33 has contacted strips I34 and I35 which establishes a circuit through wires I40 and I42, strip I35, plate I33, strip I34, part of wire I50, motor I29 and wires I41 and I44. Thus the motor I29 keeps on running until the arm I3I of the backwash timer is reset in its zero position where plate I33 is opposite gaps I35 and I31.

The timing of the other-steps takes place in a similar manner and the duration of each step is independently adjustable in the angular position of contacts I38 and I39 in each timer. The contact of circuit breaker arm H2 with strip H9 starts the timing motor for backwash timer No. 2 and when the rotating plate I32 of this timer I26 connects its contact strips I39 and I39, the valve motor isagain startedand the pilot valve rotated to set the filter valves for backwashing No. 3 filter. When arm H2 leaves strip H9, the timing motor is energized through the strips I34 and I35 to reset the timer in zero position. Similarly, as arm I I2 passes from strip H5 to strip H6 and auxiliary strip I20, the valve motor is stopped with the valves in No. 3 backwashing position and backwash timer No. 3 comes into action. This backwash timer I21 starts the valve motor at a predetermined time. depending upon the adjustment of the angular position of strips I38 and I39, and the valves are set by the rotation of the pilot valve for the filter-to-wasteoperation of the battery, the valve motor being stopped and the filter-to-waste timing motor being started when arm I I2 passes from strip H8 to contact strips H1 and I2I.

The duration of the filter-to-waste operation and thus the quantity of the water filtered to waste are determined by the angular position of strips I30 and I39 in the filter-to-waste timer I28. By placing these strips a small angular distance from the zero position of arm I3I, a short filtering to waste is obtained; this being all that is required usually when the filters are backwashed with filtered water. When these strips I38 and I39 are connected by plate I32 the valve motor circuit is closed through circuit breaker strip II1 to start the valve motor rotating the pilot valve to the normal filtering position where it is set as the arm H2 passes from strip H1 to strip H3.

In the meantime, arm I23 0! the master timer master timing motor I22 through the branch wires I4I, I45. The control system is thus ready to repeat the reconditioning cycle of the filter battery when 'arm I23 again reaches contact I24."

The same control system may of course be used for the filter battery of Fig. 1 by merely adding a backwash timer for filter No. 4 and the corresponding main and auxiliary contact strips in the circuit-breaker. The length of the circuitbreaker strips would have to be adapted to the unequal angles between the positions of the pilot valve of Figs. 2 to 9.

In a modified battery control system, shown in Figs. 18 to 24, inclusive, the master valves for the battery are replaced by a single rotary multiway master valve controlling the several inlet and outlet fiows of water to the battery as a whole and the individual filter valves are hydraulically operated valves with individual pilot valves electrically controlled as by individual solenoids. Coordinated operation of the master valve and the individual valves is obtained by means of an electric motor operating the master valve with a circuit breaker operatively connected to the stem or shaft of the master valve and with additional timing motor and switch means adapted to control both the master valve motor and the individual solenoid valves to determine the duration of the several unit backwashings and of the filtering to waste operation. I

The motor operated multiway master valve (Figs. 20 to 23) comprises a valve casing with connections to the raw or unfiltered water line, to the service outlet, to the backwa.sh and filterto-waste outlets and to the two lines connected with the tops and with the bottoms of the filterunits. Within the valve casing is a stationary port plate 3| havingports formed therein and connected, respectively, to'the top and bottom lines of the filter battery, to the service outlet line and to the backwashing and filter-to-waste outlet lines. Engaging the port plate is the slide or rotor member 32, advantageously faced with hard rubber, and surrounding the rotor is a chamber 33 into which the raw water line is connected. The slide rotor is formed with a discoid portion 34 having an opening 35 therethrough and an armate chambered portion 36. The rotor is held upon the port plate by a spring and closure member having a bore and stuffing gland through which the operating stem or shaft 31 of the rotor extends, as shown, to an enclosed gear reduction train operatively connecting the master valve rotor to the operating motor. The circuit breaker switch is arranged upon the end of the valve shaft 31.

In the filtering position (Fig. 21) of the master valve raw water fiows from the chamber 33 through the rotor opening 35 and the top line port of the port plate to the top line of the filter battery and filtered water fiows back through the bottom line of the battery to the bottom port of the master valve from which connection is made to the service outlet port through rotor chamber 36.

.In the backwashing position of the master valve (Fig. 22) connection is made from chamber 33 by rotor opening 35 to the bottom port of the valve and rotor chamber 36 connects the top port with the portconnected to the backwash waste outlet.

' Raw water flows from the inlet line to the bottom of the battery and backwash water flows from the top of the battery to waste. 1

filtered water to run from the bottom of the battery to waste.

For the several filter units 1, 2 and 3, individual valves El, E2 and E3 are provided in the form of hydraulically operated valves either of the pistoncylinder type or spring diaphragm valves and con trolled by individual pilot valves Pl, P2 and P3, the pilot valves being operated, as shown, by solenoids Si, S2 and S3, respectively.

A convenient structure for the solenoid pilot valves is shown in Fig. 19. The pilot valve P is connected to a suitable source of fluid pressure through the opening G and to a waste line through opening R. In the valve casing a passage U connects the openingR to opposite ends of a central valve cylinder in which'is a valve member V in the form of a double piston operated by a solenoid armature SM and spring. From the central valve cylinder connections B and T run to either 'end of the piston cylinder of a hydraulic valve.

When the hydraulic valve is of the diaphragm type, either one of these connections can be plugged off so as to provide the desired opening or closing of the diaphragm valve by pressure.

In the valve as shown, when the solenoid is deenergized pressure is admitted to the B connection from the opening G to open the hydraulic valve and waste fluid is discharged through the T connection and the upper branch of valve passage U to the waste line connected at R. When the solenoid is energized pressure goes to the T connection to close the hydraulic valve, waste fluid being discharged through the B connection and the lowe branch of passage U.

Valves El, E2, and E3 are so arranged as to be all opened by their solenoid pilot valves to operate the battery in the filtering stage and in the final filtering-to-waste stage. Backwashing of each filter in turn is efiected by closing two of the three individual valves and opening the one on the. unit to be backwashed. Water then flows from the unfiltered water inlet line through the master valve upwardly through each unit in turn and out through the top line to the master valveand thence to the backwash outlet. Y In the electrical control system as shown in Fig. 24, the motor operating the master valve is of the three-phase alternating current type and by an electromagnet K which is energized by a separate motor control circuit. m

The circuit breaker which operates both to make and to break the control circuit comprises abrush 2l|i contacting a drum 2| I mounted on an extension of the master valve shaft 31 and carrybut an arm 2i2 adapted to make contact with any of three main contact strips H3, 2 and 2l5 oi arcuate lengths corresponding to the angular positions of the master valve rotor in the filtering, backwashing and fllter-to-waste stages. Arm 2 l2 is'also adapted'to make contact with three auxiliary contact strips2l6, 2i! and 2l8.

To initiate backwashing in an automatic manner there is provided advantageously, as shown, a master timer. But other known means could .be used, such for example as a. switch operated by a water meterin the supply or service linev or by a, differential pressure gauge responsive 75 to the increase in the pressure drop through the started and stopped by a magnetic switch closed filters resulting from the filtering operation.

The master timer comprises a constant speed motor 2l9 driving, through a speed reducer 220 an arm 22l made of insulating material and carrying a metal plate 222'adapted to make connection between a. ring contact 223 and an adjustable contact point 224. The arrangement is such that plate 222 is in contact with point 224 for a period '01 time shorter than that required for the backwashing and filtering to waste operations of the battery.

The duration of backwashing each filter is controlled by individual adjustable backwash timers No. 1, No. 2, and No. 3 of identical construction.

.Each has a motor 225 driving, through a speed reducer 226 an arm 221 made of insulating material and carrying metallic contact plates 228, 229 and 230. Plate 223 is adapted to establish electric connection between a strip 2; (having a gap or current interrupting portion 232) and a ring contact 233; plate 229 is adapted to make connection between a ring contact 234 and either a fixed contact strip 235 extending through approximately three quarters of a circle, as shown, or an angularly movable contact strip 236 which is electrically connected to strip 235; .plate 230 is adapted to make connection between a movable contact poin 231 and a fixed contact strip 233. Strip 236 an point 231 are preferably always adjusted to their relative position as shown, and, to this end, may be connected by a member made of insulating material. The duration of backwashing is lengthened or shortened by lengthening or shortening the gap between the ends oi strips 235 and 236, and the arrangement is such that the time required for arm 221 to make one complete revolution is longer than the maximum total time required for backwashing all the filters oi the battery.

The duration of the filtering-to-waste operation is controlled by a separate adjustable timer upon energization of the respective timer motors.

The electric power for the control circuits is supplied through wires 25!! and 259. Wire 25!! has branch 25l connected to brush 2| 6, branch 252.

connected to the master timer motor 2 I 9, branch 253 connected to ring contact 233 or backwash timer No. 1, branch 254 connected to point 231 of the same timer, branch 255 connected to ring contact 233 o! backwash timer No. 2, branch 256 connected to point 231 of the same timer, branch 251 connected to ringv contact 233 of backwash timerv No. 3, and branch 258 connected to strip 246 of the fllter-to-waste timer. -Wire 259 has branch 26!! connected to motor 2|9,'branches 26l and 262 connected to motor 225 and contact 234, respectively, of backwash timer No. 1, branches 263 and 264 connected to motor 225 and contact 234, respectively, of backwash timer No. 2, branches 265 and 266 connected to motor 225 and contact 234, respectively, of backwash timer No. 3, branch .261 connected to motor 239 of the filter to waste timer and branch 268 connected to the magnet K of themotor starting switch. Wire 269 connects strip 2l3 oi. the circuit breaker and ring contact 223 of the master timer. Wire 218 connects contact point 224 of the master timer with the magnet K and has branch 211 leading to strip 238 of backwash timer No. 3,

and branch 212 leading to contact point 248 of the .filter to waste timer. Wire 213 connects auxiliary strip 216 of the circuit breaker with motor 225 of backwash timer No. 1 and has an extension 214 to strip 231. Wire 215 connected to auxiliary strip 211 of the circuit breaker has branches 216, 211 and 218 leading to the solenoids S1, S2 and S3, respectively, of the solenoid pilot valves P1, P2 and P3. Wires 219, 288 and 281 connect the solenoids S1, S2 and S3 with l5 contact strips 235 of the backwash timers Nos. 1,

2 and 3, respectively.

, Wire 282 with extension 282A leads from strip 238 of backwash timer No. 1 to motor'225 and strip 231 of backwash timer No. 2. Wire 283 with extension 283A leads from strip 238 of backwash timer No. 2 to motor 225 and strip 231 of backwash timer No. 3.

Wire 284 leads from circuit breaker strip 214 to point 231 of backwash timer No. 3. Wire 285 leads from auxiliary strip 218 to timing motor 239 and has an extension 286. to strip 244. Wire 281 connects strip 215 with ring contact 241.

In operation, the master timing motor 219 runs continuously and causes reconditioning of the battery to take place at predetermined times by moving plate 222 onto point 224. This establishes a circuit through .wires 258, 251, brush 218, drum 211, arm 212, strip 213, wire 269, contact 223, plate 222, point 224, wire 218, magnet K and wires 268 and 259. The motor starting switch closes, and the valve motor, through the gear reduction, turns the rotor of the multiport master valve until, in the backwash position, the circuit through magnet K is interrupted by arm 212 moving from strip 213 onto strip 214, and the valve motor is switched ofl.

In the backwash position of the master valve, arm 212 contacts strip 216 and establishes a first circuit through timing motor 225 of backwash timer No. 1 from wires 258 and 251 through brush 218, drum 211, arm 212, strip 216, wire 213 and motor 225 to wires 261 and 259. Motor 225 starts, and shortly moves plate 228 onto strip 231, thereby establishing a second circuit through the timing 0 motor 225, this second circuit comprising wires 258 and 253, contact 233, plate 228, strip 231, wire 214, motor 225, and wires; 261 and 259. Even though the first circuit through the motor 225 will be interruptedwhen arm 212 moves from strip 216,

55 the second circuit maintains motor 225 in operation until arm 221 has returned to its starting or zero position and the second circuit is interrupted by plate 228 leaving strip 231 and coming to rest on gap 232.

60 In the backwash position arm 212 on the master valve shaft also contacts strip 211, thereby establishing a circuit from. wires 258 and 251 through brush 218, drum 211, arm 212, strip 211 and wire 215, then branching into three branches,

1 the first branch going through wire 216, solenoid S1, wire 219, then strip 235, plate 229 and contact 234 of backwash timer No. 1, and wires 262 and 259, the second branch going through wire 211, solenoid S2, wire 288, the strip 235, plate 229 and 7 contact 234 of backwash timer No. 2, andwires 264 and 259, and the third branch going through wire 218, solenoid S3, wire 281, then strip 235, plate 228, and contact 234 of backwash timer No. 3, and wires 266 and 259. The solenoids S1, S2 and S3 75 are energized. and the pilot valves P1, P2 and P3 are moved to the position in which they cause valves E1, E2 and E3 to close; there is no flow through any of the three filters.

After a brief interval of time arm 221 of backwash timer No. 1 moves plate 229 from the end of strip 235, thereby interrupting the circuit through the first branch. Solenoid S1 is de-energized and solenoid valve P1 is moved by its spring to open valve E1 so that filter No. 1 is backwashed until plate 229 moves onto strip 236, reestablishing the first branch circuit and causing valve E1 to close. At about that time plate 238 of backwash timer No. 1 reaches point 231 which starts motor 225 of backwash timer No. 2 by means of a first circuit going from wires 258 and 254, through point 231, plate 238 and strip 238 of backwash timer No. 1, wire 282, motor 225 of backwash timer No. 2, and wires 263 and 259. Arm 221 of backwash timer No. 2 moves and soon establishes a second circuit through wires 258 and 255, then contact 233, plate 228 and strip 231 of backwash timer No. 2, wire 282A, motor 225 and wires 263 and 259. This second circuit is maintained until itis interrupted when plate 228 of backwash timer'No. 2 moves from strip 231 onto gap 232 with arm 221 left in its zero position (the first circuit having been interrupted earlier when plate 238 of backwash timer No. 1 leaves point While plate 229 of backwash timer No. 2 moves through the gap between strips 235 and 236 the solenoid S2 is de-energized, valve E2 is opened and filter No. 2 is backwashed.

Then plate 238 of backwash timer No. 2 moving onto point 231 starts the motor 225 of backwash timer No. 3, and backwashing of filter No. 3 ensues under similar control as that of filters Nos. 1

and 2.

When, at the end of the backwash period of filter No. 3, plate 238 of backwash timer No. 3 contacts point 231 a circuit is established from wires 258 and 251 through brush 218, drum 211, arm 212, strip 214, wire 284, then point 231, plate 238 and strip 238 of backwash timer No. 3, wires 21,1 and 218, magnet K, and wires 268 and 259.

The master valve motor again operates and shortly the circuit breaker interrupts the'current through the solenoids S1, S2 and S3 when arm 212 leaves. strip 211. As a result the three solenoids are de-energized and valves E1, E2 and E3 open. When the multiport master valve reaches the filter-to-waste position arm 212 moves from strip 214 (interrupting the circuit through magnet K and de-energizing the valve motor) and comes torest on strips 215 and 216.

All filters of the battery now filter to waste, and the motor 238 of the filter-to-waste timer is set in motion by a. first circuit from wires 258 and 251 through brush 218, drum 211, arm 212, strip 218, wire 285, motor 238, and wires 261 and 258. After a brief interval of time plate 243 moved on arm 241 establishes a second circuit from wires 258 and 258 through contact 246, plate 243, strip 244, wire 286, motor 239, and wires 261 and 258. This second circuit is maintained until arm 241 has returned to its zero position with plate 243 over 'gap 245 in strip 244.

Filtering to waste continues until plate 242 reaches point 248. Thereupon .the master valve motor is energized a third time by a circuit through wires 2511 and 251, brush 218, drum 211,

when arm 212 leaves strip 215 (moving onto strip 3 M3) and the valve motor is tie-energized, leaving the multiport master valve in the filtering position. The motors 225 of the backwash timers and motor 239 of the filter-to-waste timer continue to run until the arms 01 all the timers have been reset in their respective zero positions. Thereupon all electric circuits are dead, with the exception of the master timer circuit through wires 250, 252, motor 2l9, and wires 260, 259, and theapparatus is in readiness to repeat its reconditioning cycle as soon as plate 222 of the master timer supply of filtered water to be available during the I reconditioning of the battery. The advantages of coordinated battery. control outweigh any inconvenience there may be in the interruption of filtering.

What I claim is:

1. A water filter battery system under coordinated automatic operation and control comprising a plurality'of filtering units arranged in a battery, master valve means controlling fiow through the battery as a whole, a plurality of other valve means respectively controlling fiows through the individual units of the battery, Dower means actuating the master and individual valve means and electrical timing control means for said power means comprising a control circult, rotary circuit making and breaking means operated by said power means and a plurality of both master and individual rotary electric timing I motors with rotary switch means connected in electrical series with said circuit making and 4c breaking means and controlling the power means to set both the master valve means and the individual valve means for a period oftime determined by one of the master timing motors in a first or filtering position passing water downwardly through all filters or the battery to service, thenfor several intervals of time respectively determined by the several individual timing motors in a plurality of successive backwashing positions passing water upwardly through one filter at a time to waste and cutting ofi fiow to service and finally for an interval of time determined by another timing motor in a filter-to-waste position passing water downwardly through all filters of the battery to waste and cutting off flow to service, said last named timing motor operating switch means energizing said power means to return the valve means to the first or filtering position.

2. A water filter battery system under coordinated automatic operation and control comprising a plurality of filtering units arranged in a battery, master valve means controlling flow through the battery as a whole, a plurality of other valve means respectively controlling fiows through the 5 individual units of the battery, power means actuating the master and the individual valve means first to pass water downwardly through all filters oi the battery to service, then to cut off the service fiow and to pass water upwardly 70 through each filter in turn for backwashing and finally to pass water downwardly through all filters to waste and electrical timing control means for said power means comprising a control circuit, circuit making and breaking means op- 75 erated by said power means and a plurality of rotary electric motors and switch timer means connected in the control circuit and in electrical series with said circuit making and breaking means so as to time the respective backwashing of each filter and the common filtering to waste oi all filters, the several backwash timers being con- .nected to energize the power means actuating the valve means so as to control the respective durations of the individual filter backwashings and to start each succeeding backwash and the filtering-to-waste valve operation and the filter-towaste timer being connected to control the duration of filtering to .waste and return of the battery to the filtering to service operation.

3. A water filtering system comprising a plurality of filter units arranged in parallel in a battery with a raw water line, a service line and waste lines, a plurality of master valves controlling fiow through all the units of the battery as a whole, a plurality of individual valves each controlling fiow throughone unit of the battery, hydraulic operating means foreach of said master and individual valves, a fiuid pressure line, a common rotary inultiway pilot valve for energizing each of said hydraulic means by connection to said pressure line, said pilot valve having a connection with the pressure line and a plurality of ports connected by pipes to each of said hydraulic valves and a rotatable valve member with passages formed therein for connecting the valve ports to said pressure connection, the arrangement of said ports and passages being such that by rotating said pilot valve member to various angular positions in a complete circle the hydraulic valves are set in a first or filtering position of the pilot valve to pass water downwardly through all filters of the battery to service then in a plurality of backwashing positions of the pilot valve the hydraulic valves are set to shut oif fiow to service and to pass water upwardly through each of the several filters of the battery in succession to waste and in a final or filter-towaste position of the pilot valve the hydraulic valves are set to pass water downwardly through all filters of the battery to waste while shutting ofi fiow to service, and means for rotating said pilot valve rotor to said angular positions.

4. A filtering system according to claim 3 wherein the hydraulic valves are set in the several backwashing positions of the pilot valve to pass unfiltered water from the raw water line upwardly through each of the several filter units in turn for backwashing and to waste and to shut off fiow through the other filter units.

5. A water filtering system comprising a plurality of filter units arranged in. parallel in a battery with a raw water inlet line, a service outlet line and a common backwash outlet line, conduit connections at the top of each filter from the raw water line and to the backwash outlet line, master valves controlling flow through all the battery units, individual valves in'said two conduit connections for each filter, hydraulicoperating means for each of said master and individual valves, a fiuid pressure line, a common rotary multiway pilot valve for energizing each of said hydraulic means by connection to said pressure line, said pilot valve having a connection with the pressure line and a plurality of ports with respective pipe connections to said hydraulic valves and a rotatable valve member with passages formed therein for connecting the valve ports to said pressure connection, the arrangement of said ports and passages being such that by rotating said pilot valve rotor to various angular positions the master and individual valves are set in a first or filtering position of the pilot valve to pass water downwardly through all units of the battery and to service and in a plurality of other or backwashing positions of the pilot valve the master and individual valves are set to pass filtered water upwardly through each unit in succession from the other filter units and to the backwash outlet line and to shutoff the service line, and means for rotating said pilot valve rotor to said angular positions.

6. An automatically operated and controlled water filtering system which comprises, in combination, a plurality of filter units arranged in a battery with master valves controlling the battery and a plurality of individual valves for the several units, hydraulic operating means for each nected with the pilot valve rotor, and rotary timing motor and switch means also connected in said circuit and acting to close said circuit and start the pilot valve motor each time the pilot valve remains in one of said angular positions for a predetermined length of time, said circuit making and breaking means acting to open said circuit and stop the pilot valve motor upon rotation ofthe pilot valve to each of said angular positions. I

'7. In a battery of a plurality of filters, coordinated means for operation and control comprising a plurality of master valves controlling flow through the battery and a plurality of individual valves each controlling fiowthrougha single filter, a pressure cylinder and piston operating each of 5 said master and individual valves, 9. fluid pressure line and a waste line, a common rotary multiway pilot'valve for energizing said pistons by introduction of pressure fluid from said pressure line to said cylinders with discharge of waste fluid therefrom to said waste line, said pilot valve having a pressure chamber connected to the pressure line, a waste port connected to 'the waste line, a plurality of pairs of ports connected to opposite ends of said pressure cylinders and a rotatable valve member with a plurality oi passages formed therein for connecting said pairs of ports with the pressure chamber and the waste port so that upon rotation of said valve rotor member to various angular positions the master and individual valves are set in a first or normal filtering position of the pilot valve to establish a downward filtering flow through all waste position or the pilot valve the master and individual valves are set to establish a downward filtering flow through all the filters simultaneously and to waste, and means for rotating said pilot valve rotor member to said angular positions.

8. A water filter system comprising a plurality of filters arranged in a battery, a rotary multiway master valve controlling flow through all the filters of the battery, individual valves controlling flows through each 01' the filters, fiuid pressure means for operating each 01' said individual valves; a pilot valve foreach of said pressure means controlled by electrical means, an electric motor for operating said rotary master valve, a common control circuit for said motor and said electrical pilot control means, a rotary circuit breaker connected in said control circuit and having an operative connection with said rotary master valve and additional rotary electric timing motor means with rotary switch means connected in said circuit and in electrical series with said circuit breaker to'start and stop the master valve motor -and to energizeand deenergize -said pilot valve control means so that both. the master valve and the individual valves are first set to filter water downwardly through all filters of the battery and to service and then said master valve and individual valves are set to pass water upwardly for backwashing each of the filters in succession for respective times determined by said rotary timing motor and switch I means.

9. A water filter battery system under coordinated automatic operation and control'comprising a plurality of filtering units arranged in a battery, master valve means controlling flow through the battery as a whole wa, plurality of other valve means respectively controlling flows through the individual units of the battery, power means actuating the master and individual valve means and electrical timing control means i'or said ower means comprising a control circuit. rotary circuit making and breaking means in said control circuit and operated by said power means and a plurality of rotary motor operated time control switch means connected in said control circuit in electrical series with said circuit making and breaking means and adapted to energize and deenergize said valve actuating power means at predetermined times.

10. A water filter battery system under coordinated automatic operation and control comprising a plurality of filtering units arrangedin a battery, master valve means controlling flow through the battery as a whole, a plurality of other valve means respectively controlling flows through the individual units or the battery. power means actuating the master and individual valve means and electrical timing control means for said power means comprising a control circuit, rotary circuit making and breaking means in said control circuit and operated by said power means and timing motor and switch means in electrical series with said circuit making and breaking means and-timing said valve-actuating power means.

ERIC PICK. 

